TLV320DAC3101: Premature device failure

Our customer's board uses the device TLV320DAC3101IRHBT and finds about 20% failure on first power-up (no audio). The device is replaced, and continuous to function as required. What can cause the device to fail?

Some unused inputs are not tied (left open), i.e. AIN1, AIN2, VOL/MICDET, can this be a cause of failure?

Is the device apparently damaged just after power up? Or are you able to communicate with the device through I2C during the startup sequence?
What is the IOVDD voltage, 1.8V or 3.3V? I assume it's 3.3V. Is there a chance that RESET signal ramps a bit slower than 3.3V rail so that RESET is at VIH voltage after DVDD and IOVDD rails are completely powered up?
Is there a chance that you could share your schematic so we can review it?
If you don't want to post it on the forum you can send me a message to: ivan.salazar@ti.com

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